/*
 * Copyright (c) 2003-2010, Live Media Pty. Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice, this list of
 *     conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright notice, this list of
 *     conditions and the following disclaimer in the documentation and/or other materials
 *     provided with the distribution.
 *  3. Neither the name of Live Media nor the names of its contributors may be used to endorse
 *     or promote products derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.colony.networkvm;

import java.io.IOException;

import com.argot.TypeException;
import com.argot.TypeInputStream;
import com.argot.TypeMap;
import com.argot.TypeOutputStream;
import com.argot.network.TypeLink;
import com.argot.remote.MetaLocation;
import com.argot.remote.MetaObject;
import com.argot.remote.transport.TypeEndPoint;

import com.colony.networkvm.machine.NvmInstance;
import com.colony.networkvm.machine.NvmState;
import com.colony.remote.RemoteException;


public class NvmHostServer
implements TypeLink, INvmHost
{
	TypeMap _reference;
	NvmEnvironment _environment;

    public NvmHostServer( NvmEnvironment environment, TypeMap reference ) 
    {
        _environment = environment;
        _reference = reference;   
    }

    public NvmState process( NvmState nvmState ) 
    throws RemoteException 
    {
        NvmInstance instance = _environment.getNvmInstance(nvmState);
        _environment.executeInstance( instance );
        return instance.getState();
    }
    
    public MetaObject getObject( MetaLocation location ) 
    throws RemoteException 
    {
    	Object o = _environment.getHostContainer().getObject( location );
    	if ( o == null )
    	{
    		throw new RemoteException("Location not found");
    	}
    	
    	try
		{
    		int[] ids = _reference.getLibrary().getId( o.getClass() );
    		if (ids.length != 1) throw new RemoteException("Object bound to multiple types");
    		
			return new MetaObject( location,ids[0] );
		}
		catch (TypeException e)
		{
			throw new RemoteException("No type id for object: " + o.getClass().getName(),e);
		}
    }
 
    // TODO Any failures to read or write the state of the NVM will result
    //      in the client no getting a proper response.  The connection will
    //      be closed.
	public void processMessage( TypeEndPoint connection ) 
	throws IOException
	{
			
		NvmState state = null;
		try
		{
			TypeInputStream sin = new TypeInputStream( connection.getInputStream(), _reference );
			Object o = sin.readObject( NvmState.TYPENAME );
			state = (NvmState) o;
			
		}
		catch (TypeException e)
		{
			e.printStackTrace();
			throw new IOException( "failed to read NVM");
		}
		catch (IOException e)
		{
			e.printStackTrace();
			throw new IOException( "failed to read NVM" );
		}
		catch (Throwable e )
		{
			e.printStackTrace();
			throw new IOException( "failed to read NVM" );
		}
		
        NvmInstance instance;
        try
        {
            instance = _environment.getNvmInstance(state);
            _environment.executeInstance( instance );
            state = instance.getState();
        }
        catch (Throwable e2)
        {
            state.setException( e2 );
        }

		try
		{
			TypeOutputStream tmos = new TypeOutputStream( connection.getOutputStream(), _reference );
			tmos.writeObject( NvmState.TYPENAME, state  );
		}
		catch (TypeException e1)
		{
			e1.printStackTrace();
			throw new IOException( "failed to write NVM" );
		}
		catch (IOException e1)
		{
			e1.printStackTrace();
			throw new IOException( "failed to write NVM" );
		}
		


	}



}
